Geometry / Mr. Hansen 11/21/2003

Name: ________________________

Quiz on 9-point circle, §§5.1–5.3

Instructions
         Each question is worth 4 points. Think carefully before you respond.

1.	The first step in a proof by contradiction is always to ____________________ .
2.	Given: Ð1 supp. Ð4, Ð2 @ Ð3 Which lines must be parallel?
3.	Which pair(s) of angles, if any, must be congruent?
4.	Given: ¤Q Describe briefly how best to construct the center of DABC’s 9-point circle. Do not actually perform the construction.
5.	Compute mÐ1.